Gentec Pronto-250, Руководство пользователя

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Pronto-250 User Manual Revision 2.2 12
4. SAFETY INSTRUCTIONS
4.1. GENERAL
To ensure a long lifetime of accurate measurements, the Pronto-250 power probe should be maintained
within the following ambient conditions:
Storage environment temperature: 10 to 60°C, RH < 90%
Operating environment temperature: 15 to 28ºC, RH < 80%.
It is possible to store and operate your Pronto-250 power probe beyond this range. For any specific
requirements, please contact your local Gentec-EO representative.
For the most accurate measurements, center the beam on the sensor. Ideally, the beam diameter should
be the same as the one used during calibration. The beam diameter at calibration corresponds to >98%
of the encircled power centered
on 50% of the sensor’s surface area. This complies with the International
Electrotechnical Commission standard #1040: "Power and Energy Measuring Detecto
r […]". Refer to the
calibration certificate for the exact beam diameter used during calibration.
4.2. DAMAGE TO THE OPTICAL ABSORBER MATERIAL
Damage to the optical absorber material is usually caused by exceeding the manufacturer's specified
maximum incident
Average Power Density. Refer to the specifications table.
The Pronto-250 series can measure up to 250 W. The beam diameter should always be as large as
possible to avoid damaging the absorber.
We recommend using a beam size diameter that covers
70% to 80% of the
sensor’s aperture
. For the Pronto-250, this corresponds to a diameter of 16-17 mm.
In any case, the beam’s incident area should not be less than 10% of the detector’s area. Please contact
Gentec-EO to make measurements with smaller beams.
The damage threshold decreases with the laser power. Refer to the graphic in Figure 1 for the diameter
corresponding to the damage thresho
ld for a Gaussian beam profile. The “minimum 1/e² beam diameter”
is calculated to obtain a peak intensity 50% lower than the damage threshold and should be considered
as the “safe” minimum diameter. If there are “hot spots” in the beam profile, they must be considered in
the calculation of the peak intensity.
Damage may also be caused if you use a detector with a contaminated absorber surface. Slight
discoloration of the coating may occur, but this does not affect the calibration.
4.3. NOT EXCEEDING THE MAXIMUM SENSOR TEMPERATURE
The Pronto-250 has a built-
in thermometer to monitor the sensor’s temperature. In order to avoid
damaging the sensor, its temperature should not exceed 65°C. When making measurements, the
temperature of the sensor will gradually rise and it will be indicated on the screen with this icon:
If the temperature of the sensor gets close to the acceptable limit, the screen will
display the mention HOT in bold red letters, the thermometer icon will be red and
all functions will be disabled.
If this screen appears, it is essential that you remove the device from the
laser beam path and allow it sufficient time to cool before attempting another
measurement.